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公开(公告)号：US20210221126A1
公开(公告)日：2021-07-22
申请号：US16310922
申请日：2016-10-12
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric Martin , James Michael Gardner , David Maxfield
IPC: B41J2/045
Abstract: In some examples, a control apparatus for thermal management of a fluid ejection device includes a thermal controller to detect a number of a plurality of thermal measurements of the fluid ejection device that exceed a thermal threshold, and in response to determining that the number of thermal measurements that exceed the thermal threshold exceeds a count threshold, deactivating a firing controller of the fluid ejection device.
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公开(公告)号：US20200055312A1
公开(公告)日：2020-02-20
申请号：US16661103
申请日：2019-10-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Andrew L. Van Brocklin , David Maxfield
Abstract: Measuring an inkjet nozzle may include taking at least one impedance measurement after the firing command is sent to detect the presence of a drive bubble and taking another impedance measurement to detect a collapse of the drive bubble.
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公开(公告)号：US09950517B2
公开(公告)日：2018-04-24
申请号：US15170588
申请日：2016-06-01
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Andrew L. Van Brocklin , David Maxfield
CPC classification number: B41J2/04541 , B41J2/0451 , B41J2/0458 , B41J2/14153 , B41J2002/14354 , G01R27/02
Abstract: Measuring an inkjet nozzle may include taking at least one impedance measurement after the firing command is sent to detect the presence of a drive bubble and taking another impedance measurement to detect a collapse of the drive bubble.
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公开(公告)号：US20170326884A1
公开(公告)日：2017-11-16
申请号：US15522340
申请日：2014-11-25
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Vincent C Korthuis , David Maxfield , Andrew Queisser
IPC: B41J2/175
CPC classification number: B41J2/17543 , B41J2/17546 , B41J2/17566 , B41J2002/17579
Abstract: A liquid propelling component includes a liquid channel, a circuit block. The circuit block includes a first conductor disposed in the liquid channel to be in contact with liquid in the channel and a second conductor insulated from liquid in the channel. The liquid propelling component further includes a memory storing a digital code that corresponds to an analogue value of the second conductor under a predefined charge.
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公开(公告)号：US20170217165A1
公开(公告)日：2017-08-03
申请号：US15486602
申请日：2017-04-13
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： David Maxfield
IPC: B41J2/045
CPC classification number: B41J2/04563 , B41J2/04585 , B41J2/04586 , B41J2/14072 , B41J2/14153
Abstract: An example provides a fluid ejection apparatus including a fluid feed slot to supply a fluid to a plurality of drop ejectors, a first rib at a first side of the fluid feed slot and supporting drop ejection circuitry to control ejection of drops of the fluid from the plurality of drop ejectors, and a second rib at a second side, opposite the first side, of the fluid feed slot supporting a thermal sensor to facilitate determination of a temperature of the first rib and the second rib.
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Patent Agency Ranking
公开(公告)号：US09701116B2
公开(公告)日：2017-07-11
申请号：US15262248
申请日：2016-09-12
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Andrew L. Van Brocklin , Eric T. Martin , Alexander Govyadinov , David Maxfield
IPC: B41J2/045 , B41J2/14 , B41J29/393
CPC classification number: B41J2/14153 , B41J2/0451 , B41J2/04555 , B41J2/0458 , B41J2/04586 , B41J29/393 , B41J2002/14354
Abstract: A method for determining an issue in an inkjet nozzle with impedance measurements, includes taking a first impedance measurement to detect a drive bubble with an impedance sensor; and taking a second impedance measurement to detect said drive bubble with said impedance sensor after said first impedance measurement.
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公开(公告)号：US09669624B2
公开(公告)日：2017-06-06
申请号：US15039259
申请日：2013-11-26
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： David Maxfield
CPC classification number: B41J2/04563 , B41J2/04585 , B41J2/04586 , B41J2/14072 , B41J2/14153
Abstract: An example provides a fluid ejection apparatus including a fluid feed slot to supply a fluid to a plurality of drop ejectors, a first rib at a first side of the fluid feed slot and supporting drop ejection circuitry to control ejection of drops of the fluid from the plurality of drop ejectors, and a second rib at a second side, opposite the first side, of the fluid feed slot supporting a thermal sensor to facilitate determination of a temperature of the first rib and the second rib.
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公开(公告)号：US20160271940A1
公开(公告)日：2016-09-22
申请号：US15170588
申请日：2016-06-01
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Andrew L. Van Brocklin , David Maxfield
IPC: B41J2/045
CPC classification number: B41J2/04541 , B41J2/0451 , B41J2/0458 , B41J2/14153 , B41J2002/14354 , G01R27/02
Abstract: Measuring an inkjet nozzle may include taking at least one impedance measurement after the firing command is sent to detect the presence of a drive bubble and taking another impedance measurement to detect a collapse of the drive bubble.
Abstract translation: 测量喷墨喷嘴可以包括在发射发射命令之后进行至少一个阻抗测量，以检测是否存在驱动气泡，并采取另一阻抗测量来检测驱动气泡的崩溃。
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公开(公告)号：US10725490B2
公开(公告)日：2020-07-28
申请号：US16318201
申请日：2016-10-13
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： James Michael Gardner , Eric Martin , David Maxfield
Abstract: In some examples, a control circuit for a bypass capacitor includes a switch assembly that is activatable between a first state to connect the bypass capacitor between nodes, and a second state to disconnect the bypass capacitor between the nodes. The switch assembly includes a first switch to activate a first path comprising a first resistance to begin charging the bypass capacitor, and a second switch to, a delayed time after the activating of the first path, activate a second path comprising a second resistance lower than the first resistance, the activated second path connecting the bypass capacitor between the nodes.
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公开(公告)号：US10654268B2
公开(公告)日：2020-05-19
申请号：US16210143
申请日：2018-12-05
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Gerard Alzona , David Maxfield , Dustin W Blair , Sterling Chaffins , Andrew L Van Brocklin
Abstract: In some examples, a controller receives impedance sensor values from an impedance sensor in a printhead, determines whether the impedance sensor values correlate to a production of an effective drive bubble for the printhead, and issues a command to modify a firing parameter for a fluid ejector of the printhead based on the impedance sensor values.
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